Vulnerability Details CVE-2019-15847
The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 64.5%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0